A self-supported electrochemical sensor for simultaneous sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers,Analytical Methods

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A self-supported electrochemical sensor for simultaneous sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers
Analytical Methods ( IF 2.7 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1039/c7ay02223a
SongGe Zhang _{1,

2,

3,

4,

5} , Han Zhu _{1,

2,

3,

4,

5} , PiMing Ma _{1,

2,

3,

4,

5} , Fang Duan _{1,

2,

3,

4,

5} , WeiFu Dong _{1,

2,

3,

4,

5} , MingLiang Du _{1,

2,

3,

4,

5}

Affiliation

The key issue in efficient electrochemical detection of trace heavy metal ions (HMIs) is to design hierarchical nanostructure electrodes with high sensitivity and low detection limit. In this study, bimetallic PtAu alloy nanoparticles (PtAuNPs) with uniform size and distribution were constructed in electrospun carbon nanofibers (CNFs) by combining an electrospinning procedure and an in situ thermal reduction process. The PtAu/CNF membrane can be directly used as a sensor electrode for simultaneous detection of trace Cd²⁺, Pb²⁺, and Cu²⁺ by square wave anodic stripping voltammetry (SWASV). The prepared PtAu/CNF membrane is capable of simultaneously detecting Cd²⁺, Pb²⁺, and Cu²⁺ with a sensitivity of 0.10 μM and correlation coefficients of 0.976, 0.993, and 0.976, respectively, indicating high sensitivity and good linear relation. The excellent sensitivity and low detection limit for HMI detection were ascribed to the high conductivity of CNFs, fast response of PtAu alloy NPs, and high specific surface area of the hybrid structure. The present research provides a convenient and efficient way to construct new sensors for simultaneous trace detection of HMIs.

中文翻译：

基于PtAu合金/碳纳米纤维的痕量重金属离子同时敏感检测的自支撑电化学传感器

有效电化学检测痕量重金属离子（HMI）的关键问题是设计具有高灵敏度和低检测限的分级纳米结构电极。在这项研究中，通过结合电纺丝程序和原位热还原工艺，在电纺碳纳米纤维（CNFs）中构建了尺寸和分布均匀的双金属PtAu合金纳米颗粒（PtAuNPs）。PtAu / CNF膜可直接用作传感器电极，通过方波阳极溶出伏安法（SWASV）同时检测痕量Cd 2 ⁺，Pb ²⁺和Cu ²⁺。制备的PtAu / CNF膜能够同时检测Cd 2 ⁺，Pb ²⁺和Cu²⁺的灵敏度为0.10μM，相关系数分别为0.976、0.993和0.976，表明灵敏度高且线性关系良好。HMI检测的出色灵敏度和低检测限归因于CNF的高电导率，PtAu合金NP的快速响应以及混合结构的高比表面积。本研究提供了一种方便有效的方法来构建用于同时跟踪HMI的新传感器。

更新日期：2017-11-15

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